diff options
author | zuul <zuul@gerrit.asterisk.org> | 2016-11-16 15:06:24 -0600 |
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committer | Gerrit Code Review <gerrit2@gerrit.digium.api> | 2016-11-16 15:06:24 -0600 |
commit | f68790d46a8af0a5d801fc89137e72ebfd9e5946 (patch) | |
tree | bfe64093ee037dbe2b5ffffb5a16e16c3c34ea3f /main | |
parent | f4f152f35ca303d480be54d483327a53c21d44b7 (diff) | |
parent | 2fefb6187ffe6d92b863ca3c2ee20a4a51554498 (diff) |
Merge "Revert "Revert "Add API for channel frame deferral.""" into 13
Diffstat (limited to 'main')
-rw-r--r-- | main/channel.c | 45 | ||||
-rw-r--r-- | main/channel_internal_api.c | 6 |
2 files changed, 51 insertions, 0 deletions
diff --git a/main/channel.c b/main/channel.c index 278104cc9..e85208b46 100644 --- a/main/channel.c +++ b/main/channel.c @@ -1061,6 +1061,25 @@ struct ast_channel *ast_dummy_channel_alloc(void) return tmp; } +void ast_channel_start_defer_frames(struct ast_channel *chan) +{ + ast_set_flag(ast_channel_flags(chan), AST_FLAG_DEFER_FRAMES); +} + +void ast_channel_stop_defer_frames(struct ast_channel *chan) +{ + ast_clear_flag(ast_channel_flags(chan), AST_FLAG_DEFER_FRAMES); + + /* Move the deferred frames onto the channel read queue, ahead of other queued frames */ + ast_queue_frame_head(chan, AST_LIST_FIRST(ast_channel_deferred_readq(chan))); + /* ast_frfree will mosey down the list and free them all */ + if (!AST_LIST_EMPTY(ast_channel_deferred_readq(chan))) { + ast_frfree(AST_LIST_FIRST(ast_channel_deferred_readq(chan))); + } + /* Reset the list to be empty */ + AST_LIST_HEAD_INIT_NOLOCK(ast_channel_deferred_readq(chan)); +} + static int __ast_queue_frame(struct ast_channel *chan, struct ast_frame *fin, int head, struct ast_frame *after) { struct ast_frame *f; @@ -3885,6 +3904,32 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio) if (!AST_LIST_EMPTY(ast_channel_readq(chan))) { int skip_dtmf = should_skip_dtmf(chan); + if (ast_test_flag(ast_channel_flags(chan), AST_FLAG_DEFER_FRAMES)) { + AST_LIST_TRAVERSE_SAFE_BEGIN(ast_channel_readq(chan), f, frame_list) { + if (ast_is_deferrable_frame(f)) { + if (f->frametype == AST_FRAME_CONTROL && f->subclass.integer == AST_CONTROL_HANGUP) { + struct ast_frame *dup; + + /* Hangup is a special case. We want to defer the frame, but we also do not + * want to remove it from the frame queue. So rather than just moving the frame + * over, we duplicate it and move the copy to the deferred readq. + * + * The reason for this? This way, whoever calls ast_read() will get a NULL return + * immediately and can tell the channel has hung up and do what it needs to. Also, + * when frame deferral finishes, then whoever calls ast_read() next will also get + * the hangup. + */ + dup = ast_frdup(f); + AST_LIST_INSERT_TAIL(ast_channel_deferred_readq(chan), dup, frame_list); + } else { + AST_LIST_INSERT_TAIL(ast_channel_deferred_readq(chan), f, frame_list); + AST_LIST_REMOVE_CURRENT(frame_list); + } + } + } + AST_LIST_TRAVERSE_SAFE_END; + } + AST_LIST_TRAVERSE_SAFE_BEGIN(ast_channel_readq(chan), f, frame_list) { /* We have to be picky about which frame we pull off of the readq because * there are cases where we want to leave DTMF frames on the queue until diff --git a/main/channel_internal_api.c b/main/channel_internal_api.c index 90f59d64a..4bc770d3b 100644 --- a/main/channel_internal_api.c +++ b/main/channel_internal_api.c @@ -223,6 +223,7 @@ struct ast_channel { struct stasis_cp_single *topics; /*!< Topic for all channel's events */ struct stasis_forward *endpoint_forward; /*!< Subscription for event forwarding to endpoint's topic */ struct stasis_forward *endpoint_cache_forward; /*!< Subscription for cache updates to endpoint's topic */ + struct ast_readq_list deferred_readq; }; /*! \brief The monotonically increasing integer counter for channel uniqueids */ @@ -1698,3 +1699,8 @@ enum ast_channel_error ast_channel_internal_errno(void) return *error_code; } + +struct ast_readq_list *ast_channel_deferred_readq(struct ast_channel *chan) +{ + return &chan->deferred_readq; +} |